Venetian blind



Dec. 1s, 1936.

M. L. WIENER VENETIAN BLIND Filed Feb. 23, 1935 mm INVENTOR M L. Weener Patented Dec. 15, 1936 UNITED. STATES VENETIAN BLIND Martin L. Wiener, San Leandro, Calif., assignor to Ry-Lock Company Ltd., .San Leandro, Calif., a

corporation Application February 23, 1935, Serial No. 7,685

2 Claims.

. This invention relates generally to Venetian blinds and is directed in particular to, and it is my principal object to provide, a Venetian blind having a combination head and tilt rail, said rail having an effective locking mechanism forthe blind raising cords concealed therein.

Another object of my invention is to provide a Venetian blind rail structure and unitary cord locking mechanism which is capable of mass production in standard sizes.

A further object of the invention is to produce a simple and inexpensive device and yet one which will be exceedingly effective for the purpose for which it is designed. v

These objects I accomplish by means of such structure and relative arrangement of parts as will fully appear by a perusal of the following specification and claims.

In the drawing similar characters of reference indicatecorresponding parts in the several views:

Figures 1 and 2 are fragmentary longitudinal sections of the combination tilt and head rail illustrating the operative and non-operative positions of the holding dog. Figure 3 is a top plan of the unit comprising the holding dog and direction changing pulley. Figure 4 is a transverse section of the combination tilt and head rail taken on line 4-4 of Figure 2. Figure 5 is a transverse section of a. modified type of the combination tilt and head rail.

Referring now more particularly to the characters of reference on the drawing, my improved Venetian blind comprises a combination tilt and head rail, said rail comprising as a unitarymemher a main rail I having a convexly curved upper face and a smaller convexly curved rail 2 attached thereto and projecting upwardly therefrom as illustrated in Figure 4. The main rail I is formed with spaced grooves in its upper face, one of which is shown .at 4, while the cap rail 2 is formed with a downwardly opening longitudinal groove 5 which extends the full length of the rail. v This combination tilt and head rail, hereinafter referred to as the rail, is supported at one -end from the window casing by means of a bracket (not shown) secured to the casing and 0 which is formed with an opening into which a pin I rotatably and removably projects from the end of the rail. The opposite end of the rail is removably supported by blindtilting mechanism of suitable character which is secured to the window casing. The blind slats are suspended from a blind raising cord passes.

the rail in horizontal relation by ladder tapes as is common in Venetian blind construction.

The blind raising and cord locking mechanism comprises separate blind raising cords 8 and 8a by means of which the slatted blind is controlled; 5 the cord 8a depending through the bottom of the rail from apulley ll journaled in groove 4 while the cord 8 extends from pulley ll through groove 5 in the cap rail over another similarly mounted pulley (not-shown) adjacent the other end of the 10 rail. These spaced vertically depending cords then extend through matching slots in the slats and are secured at theirlower ends to the bottom. rail as is usual practice. The pulley II is of sufficient width to receive both cords 8 and 8a 15 and after passing over this pulley, such cordsdepend through the bottom of the rail and extend down therefrom as at B for manipulation in unison.

The pulley H is rotatably mounted in a U 20 shaped metal case I! in the groove 4 by means of a pin l3 which extends transversely-through the upstanding sides of the metal caseand into the rail at the sides of the groove. The pin thus keeps the case in place in the groove as well as 25 serving as an axle for the pulley.

Also rotatably mounted in the case adjacent the pulley is a dog ll-pivoted on another transverse pin l5 which extends through the case into the rail at the sides of the grooves in the same 30 manner as the pin l3. The bottom of the case is formed with two elongated and transversely spaced guide slots l6 through each one of which In this manner the cords are maintained in side by side relation after 35 passing over the pulley.

The face of the dog I4 is formed with transverse cord engaging teeth l! which are on a curve eccentric with .the axis of the dog, the eccentricity increasing from top to bottom as shown in Fig- 40 ure. 1. The sides of the case I2 at the end adjacent the dog are turned inwardly to form stops It for the dog when the same is in an inoperative position.

When it is desired to raise the blind and lock 5 the same in a folded position, the cords indicated as B, are drawn downwards and in this direc-, tion of movement the teeth of the .dog are disengaged from the cords as shown in Figure 1. when the blind has been folded, the cords B are moved sideways in the direction of the dog which causes the cords toengagethe teeth of the dog. Then as the cords are released, the dog is drawn up clamping the cords between the dog and the pulley, as in Figure 2, thereby holding the blind in folded 66 and suspended relation. To release the blind, the cords are pulled down enough to allow the dog to fall into an inoperative position and the cords then held in vertical position are allowed to move upwards over the pulley without again engaging the dog;

Figure 5 illustrates a modifled form of rail.-

This modified rail comprises a relatively thick main rail la grooved longitudinally from end to end as at G. Two relatively short deep grooves 3a are spaced apart as are the grooves 3 and 4 in Figure 1 for the reception of the pulleys. A thin flat strip H is recessed in the upper face of the rail above the groove G to form a cover for said groove and the cords therein.

From the foregoing description it will be readily seen that I have produced such a device as substantially fulfills the objects of the invention as set forth herein. ,7

While this specification sets forth in detail the present and preferred construction of the device, still in practice such deviations from such detail may be resorted to as do not form adeparture from the spirit of the invention, as defined by the appended claims.

Having thus described my invention, what I claim as new and useful and desire to secure by Letters Patent is: 4

1. Iri a Venetian blind, a rail from which the blind slats are supported, a pulley mounted in said rail on a horizontal axis and from one side of which both blind control cords depend, said rail havinga bottom opening through which the cords project, a dog mounted in the rail beyond said side of the pulley on an axis parallel to that of said pulley and adapted to swing downwardly of its own weight, stop means limiting the downward movement of the dog, and a curved cord gripping face on the dog disposed eccentric to the axis thereof and with its eccentricity increasing from the top down.

2. A structure as in claim 1, in which said bottom rail opening 'is elongated and extends from the adjacent side of the pulley under the adjacent portion of the dog.

- MARTIN L. WIENER. 

